Safety thrust-bearing for grinding-machines.



A. HARVEY.

SAFETY THRUST BEARING FOR GRINDING MACHINES.

APPLIGATlON FILED FEB. 9, 1912.

1,049,710. Patented JanfF, 1913.

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awuento c Wbtmmow UNiTED STATES PATEn-T' OFFICE.

AMASA HARVEY, 0F GEORGETOWN, soUT'H cARoLiNA'."

SAFETY THRUST-BEARING FOR GRINDING MACHINES.

T 0 all whom, it may concern:

Be it known that I, AMASA HARVEY, a citizen of the United States,residing at Georgetown, in the county of Georgetown and State of SouthCarolina, have invented certain new and useful Improvements in SafetyThrust-Bearings for Grinding-Machines, of which the following is aspecification, reference being had to the accompany ing drawings.

This invention has relation to a hog or refuse grinder and has for itsprimary obj eet to provide a machine for this purpose wherein a rotaryCutting wheel or disk is provided in which one or more series of cuttingknives are mounted, and means for preventing breakage of the knives orother,

parts of the mechanism when the knives encounter metallic objects orother relatively hard resisting foreign materials in the refuse beingground or masticatcd.

Still another object of the invention resides in the provision of a.machine of the above character embodying features of simplicity,durability and etiiciency and which may be manufactured atcou'iparatively small cost.

With the above and other objects in view, the invention consists of thenovel 'features of construction, combination and arrange mentof partshereinafter fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a plan view partly in scctionillustrating the present; invention; and Fig,

2 is a fragmentary side elevation of a machine provided with myinvention.

Referring in detail to the drawings 5 designates a frame ofsubstantially rectangular form in plan which is preferably constructedof angle iron.- The parallel longitudinaL portions of the spaced frameare centrally provided with the vertical bearing standards (5 upon theupper ends of which the lower half or base portions of the bearings -7are formed. In these hearings the shaft 8 is mounted, said shaftextending beyond one of the bearings and having a band wheel or pulleyt) keyed or otherwise fixed thereon. The extreme end of the shaft; 8 issupported in a suitable hearing it). i

A euttingwheel or disk It is rigidly keyed upon the shaft 8 between thelongi tudiual bars of the base frame 5, said wheel being provided with ahub or extension 12,

7 one end of which carries the friction washp Specification of LettersPatent.

Application filed February 9, 1912. Serial No. 676,580.

Patented an. 7, 1913.

ers l3 and is disposed in an annular recess '15 provided in one face ofa thrust collar 14 which is loosely mounted upon the shaft 8. The diskor wheel 11 is providedwith the usual grinding or cutting knives, (notshown), which may be mounted in said disk in any approved manner.

In order to obviate liabilityof serious injury to the cutting knivescarried by the disk or breakage of other parts of the machine, I providethe vertically disposed lugs 30 which are secured to one of the bearingstandards- 6 at their lower ends, said ln s being arranged on oppositesides of te. shaft-8 and having their upper ends disposed adjacentthereto.

or recesses 32 which are formed in the upper ends'of the lugs 30.Adjacent to the latter cuds of the adjusting screws, rectangularshoulders or enlargements are formed thereon; which engage with the lugs30. By adjusting the screws 31, the thrust collar 14 may be moved towaror from the diskor wheel it so that the knives carried by the disk maybe properly disposed with relation to the bed knife and adjusted towardor from the same. As the upper free end por-v tions of the lugs 30 areconipa-izttively weak, it will be obvious that when a piece of metal orother foreign material is fed to the machine with the refuse material,the engagement of the knives on the d sk with this comparatively hardresisting object will cause the disk and shaft-toinove. long uuliually.thus forcing the collar 14 tfiuaittt'llQ lugtit), and thereby bonding orbreaking said lugs. in this l'uauncr liability of serious damage to themachine elements is practicallyclimiuated.

A suitable set collar 3-1 is secured upon the shaft 3 agaiiist the endof one of the bearings 7 for said shaft to prevent longitudinal movementof the shaft in its bearings and thereby maintain the knife carryingdisk at all times in its adjusted position on said shaft. i

From the foregoing it is believed that the construction and operation ofmy im 'iro'ved hog or refuse grinder will be fully undeu stood.

My improved construction provides a machine of this character having a.maximum of durability and working clticicney, while Adjusting screws 31are threaded in one end of the thrust 'collar 14 .at diametricallyopposite points and have their other ends seated in sockets at the sametime the machine consists of a comparatively small number of elements.

Having thus described the invention what is claimed is r 1, In a machineof the character described, a rotary shaft, a disk 'keyed forlongitudinal movement upon the shaft, a thrust collar loosely; mountedupon the shaft between one face of the disk and one of the shaftbearings, breakable lugs arranged upon opposite sides of the shaft, andscrews threaded" in the thrust'collar and having shoulders bearingagainst said lugs, the adjustnient of said screws in the collarpositivel moving said collar and the disk 1ongitu inally upon the;shaft, the shoulders upon said screws bein g adaptetlto force the lugsfrom their normal positions and break the. same upon abnormal pressureagainst one side of the disk in an axial direction and toward the lugs.

- 2. In a machine of the character described, a rotary shaft, a diskkeyed for lonof the, collar wit-hsa1d shaft, said screws being providedwith shoulders to bear against the lugs and break the same upon abnormalpressure against one side of the disk in an axial direction and towardthe In s.

n testimony whereof I hereunto afiix my signature in the presence of twowitnesses. L AMASA HARVEY.

Witnesses w M. C. LYDDANE,

no. S. LIVINGSTON.

